Question

the nth term of an ap is 5n + 3 and the Fourth term is​

Answer 1

245

Given, a

n

=5n−3

Put n=1, a

1

=5−3=2

Put n=10, a

10

=5×10−3=47

Sum =

2

n

(a+l)

=

2

10

(2+47)

= 49×5

=245